I have a database returing these result sets for two almost identical queries: #v+ $ select id, pid, length(pid), md5(pid) from product where pid like '8000000'; id | pid | length | md5 ------+---------+--------+---------------------------------- 3594 | 8000000 | 7 | 60b5792913f4acbccf45c281fa9e3c9f (1 row) $ select id, pid, length(pid), md5(pid) from product where pid like '%8000000'; id | pid | length | md5 ------+---------+--------+---------------------------------- 3594 | 8000000 | 7 | 60b5792913f4acbccf45c281fa9e3c9f 722 | 8000000 | 7 | 60b5792913f4acbccf45c281fa9e3c9f (2 rows) #v- There should be only one product with this id (no unique key, because this is not a general constraint but just the current situation), but there are two. Looking for it with query 1 I got only one result, suspecting leading or trailing blanks I found the other one using the wildcard. But: What is wrong here? There must be some difference between the two product ids, but with the same md5-hash there seems to be none. This is by far too trivial to be a postgresql-bug, but what exactly am I missing here? Bye, Stefan
